Dies for forging auger-bits and the like.



E. T. McPHERSON.

DIES FOR FORGING AUGER BITS AND THE LIKE.

APPLICAHON FILED MAY 20, I915.

Patented May 23, 1916.

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E. T. MCPHERSQN.

[ms FOR FORGING AUGER ans AND THE LIKE.

APPUCAHON FILED MAY 20, 1915.

latQnred M21) 23, 1916 2 SHiETS-SHELT 2- UNITED STATES PATENT OFFICE.

ELMER T. McPI-IERSON, OF WILMINGTON. OHIO, ASSIGNOR TO THE IRWIN AUG-ER BIT COMPANY. OF WILMINGTON. OHIO, A CORPORATION OF OHIO.

DIES FOR FORGING AUGER-BITS AND THE LIKE.

Application filed May 20. 1915.

To a Whom it may oncern Be it known that I. Emma T. McPuEie sox. a citizen of the United States. residing at Wilmington. in the county of (linton and State of Ohio. have invented certain new and useful Improvements in Dies for orging Auger-Bits and the like. of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to dies for forging auger bits and the like and more particularly to dies for forging the square and round portions of such hits. in the manufacture of anger hits and similar articles it is customary to forge the bit from a bar of steel which is usually square or round in cross section. The forging of the shank of the bit. including the round and tapered square portions thereof. requires a series of operations and it is accomplished by means of power operated hammers provided with dies of the proper shape. The dies commonly used for this purpose are such that the character bf the worlfis left more or less to the judgment or skill ofthe-operator. As a result there is apt to be considerable varia tion between different articles which are supposed to be exactly alike. This is particu larly true in connection with the tapered shanks of the bits. In a given size of bits these shanks are supposed to be of exactly the same dimensions but in practice they will frequently vary to a noticeable extent in width or thickness and in the length of the taper.

The object of this invention is to provide a set of dies of such a character that the linished product will be uniform; and furlher. to produce a set of dies which will accomplish this result without complicating the character of the die and without adding materially to the expense of making the same.

ll is also an object of the invention to pro vide means for controlling the length of the finished shank of the bit.

in the accompany;pg drawings. Fignre l is a top. plan view of the lower or anvil die forming a part of a set of dies embodying my invention; Fig. 2 a perspective view of the stock from which the hit is to be pro duced: Fig. 3 is a similar view of the bit after the roughening out operation; Fig. 4 is a similar view of the bit after the round has been finished; Fig. 5 is a similar Specification of Letters Patent.

Patented May 23, 1916.

Serial No. 29,284.

view of the bit after the tapered shank has been finished; Fig. 6 is a similar view of the bit with a number applied thereto; Fig. 7 1s a sectional view taken through those portions of the dies which rough out the round and shank portions; Fig. 8 is a sectional view of the dies taken through those portions thereof which finish the round; Fig. 9 is a sectional view taken through those portions of the dies which finish the shank; Fig. 10 a transverse, sectional view showing the marking device; and Fig. 11 is a detail view showing the adjustable stop for that portion of the anvil die on which the shank is finished.

In carrying out my invention I provide a pair of dies consisting of the lower or anvil die 1 and the upper or hammer die 2. As will be readily understood the lower die is mounted in a fixed position upon a supporting block or anvil while the upper die is carried by the hammer. or the like. and is arranged in exact alinement with the lower die. The two parts have their adjacent sur-- faces shaped to correspond to the character of the work which it is desired to produce, each die being cut away to form a recess of such a shape that it will receive the adjacent half of the work. Auger bits and the like are commonly formed from straight stock. either square or round bars. and I have shown at 3. in Fig. 2. a blank designed for the production of an anger bit. The first operation is the roughing out of the shank and round portions of the bit to give the same the shape shown in Fig. 3. To accomplish'this 1 have provided the dies with to operating portions each having an angular recess 4 and a curved recess 5. The angular recess l is preferably V-shape in cross section when square shanks are to be made and the curved recess is approximately semicircular in shape. although its width at the top may be more than twice its depth. The V- shaped recess is tapered and at the tapered end thereof is closed by a wall or stop 6. This stop is preferably carried by the lower die and extends above the upper surface of that die far enough to close the end of the tapered recess in the upper die when the latter die resting upon the former thus forming a solid stop against which the end of the work may abut. It will be understood. of cou se. that the upper die is cut away tomeceive that portion of the stop res forming a recess in the liner 15 by means of hi: the die is secured in position and inserting the upright or shank of the marking finger in this recess.

The operation of the dies will be readily understood Brieflv, it is as follows: The [ork or if: nk. shown in Fig. '2, is heated and place in the roughing out portions of tho dies where it is operated upon until the --n'.-'.- has been roughed out to the shape own in Fig. 3. It is then, without reheat- .ng. transferred to the portions 8 of the dies Where the round is finished. It is then, again without reheating. transferred tothe in lined. portions of the dies Where the .liill lk is finished, and is then placed be ni-ath the resilient finger 13 and marked. The complete operation is performed with one heating of the metal and the location and arrangement of the several portions of lludies are such that the operations are quickly and easily performed and the work accurately controlled so that the finished articles are uniform.

in a copending application. Serial No. 3 .307. filed h the applicant Dec. :2 1915, a method of making the shanks of boring to ls. such as the shanks herein described and shown is claimed, the apparatus shown.

di-scrihed and claimed herein being suitable for -.-irr ving out said method.

Having thus fully described my invention, what I claim as: new and desire to secure y Letters Patent, is rl. in a device for forging l'uWf-I' die and an upper 'die, said dies having p rtions cooperating to rough on the round and shank portions of said hit, one of aid dies having a stop extending into the plane of the other die and said other die being recessed to receive said stop, whereby the size of said shank portion can he regulutcll and a perfectregister insured.

12. Ina device for forgingauger hits, a lower die and an upper die, said dies having portions cooperating to rough out the round and shank portions of said hit, one of said dies having a stop extending into the plane of the other die and said other die having a re ess and shoulder. Said recess adapted to re eive said stop and said shoulder arranged to extend in front thereof. whereby thersize of said hank portion can he regulated.

auger hits, a

"" lower die and an upper 3. In a device for forging auger bits and the like, a lower die and an upper die, said dies having roughing out portions comprising cooperating angular recesses and 00- operating curved recesses, said angular recesses being tapered away from the curved recesses, and said lower die having a stop arranged at the tapered end of the angular recess therein and extending above the surface of said lower die, said upper die being cut away to receive said upwardly projectmg stop.

4. In a device for forging auger hits, a lower die and an upper die, said dies having fiat portions sunken therein converging toward each other, a stop at the converging ends of said flat portions, 21 rest for the round of the bit at the diverging ends of said flat portions located on the lower die, and the hat portion of said upper die adjacent said rest being spaced vertically above the same a distance greater than the diameter of said round.

In a device for forging auger hits, a lower die and an upper die, said dies having flat portions cooperating to finish the shank of a bit, and an adjustable stop upon the lower die to control the finishing operation and regulate the size of the shank.

6. Ina device for forging auger bits, a

die. said dies having portions cooperating to finish the shank of the hit, the lower die having a stop at one end to control the finishing operation and regulate the size of the shank, and a rest at the other end thereof to support the round portion of the hit in proper position relatively to said shank during the finishing operation.

7. In a device for forging auger hits, a lower die and, an upper die, said dies having flat portions cooperating to finish the shank of a hit. the lower die having a stop at. one end to control the finishing operation and regulate the size of the shank, the portions of the dies opposite the stop being ar ranged to prevent the distortion of the round or stock during the finishing opera tion.

In testimony whereof, I affix my signature.

El. ER T. clll IIRSON. 

